The Keeper of Favorite Cards [Un-Known Event Playtest Cards]

Whenever The Keeper of Favorite Cards enters or attacks, choose a nonland card name and add it to your favorites list for this game. (Your joy is boundless. So is your favorites list.)

Your favorite creatures get +1/+0.

Whenever you cast one of your favorite noncreature spells, create a 1/1 white Soldier creature token.